Dosage calculations, until they stop being scary
Problems are generated fresh every time, so there is nothing to memorise and no way to run out. Write the units at every step. That single habit prevents most of the errors this section is designed to catch.
Infusion time
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A 250 mL bag is infusing at 125 mL/hr. How long until the bag is empty?
hours
Round to two decimal places.
Formula
Time (hr) = Total volume (mL) ÷ Rate (mL/hr)
Where marks get lost
Reporting a decimal hour when the question asks for hours and minutes.